Device for supporting workpieces to be tooled



E. BURRI 2,44%562 DEVIGE FOR SUPPORTING WORKPIECES TO BE TOOLED Aug. 4, 1'?

Filed April 21, 1945 tmvemoa: Ernst Eu/rL' ATTORNESS Patented Aug. 24, 1948 UNI-TED STA-res PATENT" OFFICE .DEVIGEvFflRxSUlPORTING-WORKPIEQES- QL E TOOLED...

Ernst Burri, Zurich, Switzerland,-=assig-nor t- Inpac0'-A.-G.;- Zurich Switzerland Application Ami-1:21, 1945,.Serial.N0. 589,520.. In SwitzerlandFebruary '25, 1944.

Section 1,;1-Publ-ic Law 6911,:August 8,1946 I Patent expires Februaryv 25, .19 64 4: Glairns. (Casi-521) I The present invention-relates to.-aworkpiece fixing device which chiefiyiserves to allow workpieces, which have to he tooled in-a horizontal or inclined position, to be quickly-fixed and'unfixed, or-changed imposition. The manufacture of articles inseries very often-requires touchingupby hand which canbe done in -less time than is required for fixing unfixing or-changingthe position of the workpiece. The opening and closingof known fixing devices requireswa-manm ual operation which compels-the workmam to lay down his tool inorder to be abletohold-the workpiece with onehand "and-to open-or close the fixing device with the other; and this-means a comparatively great'loss of time. Preferably-.41

it should also be possible to bring thefixing device into another position relative to the workbench during the tooling, but that 'is'impossible with the fixing devices hitherto used.-

The aim of the present invention is ;to;create..=

simple designs, --in-side View; partly in'-section;'

Fig. 2 the same-seenirom above. Fig.3 the same, seen-from the front; with the bolt-head and bench top removed;

Fig. 4 a tongs-shaped fixing device, with two springs and ball-joint for setting the tongs in an oblique position, in side view, partly in section,

Fig. 5 the tongs-shaped fixing device according to Fig. 4 in end view, partly on the line 5-5.

Fig. 6 a spring guide bush for Figs. 4 and 5, seen from above,

Fig. 7 a gripper-shaped fixing device.

On a base I (Fig. 1), which can be fixed to a workbench by screws 2, the bent-over part 3 of a tongs-arm 3 is firmly clamped by a nut 4 and a spring washer in such a way that it can be turned round, but yet remains sufliciently firm to tool the workpiece fixed in the device. The tongs-arm 3 forms the lower part of the tongs and is provided with a swivelling clamping jaw gether.

.2 5 which is fixed by a bolt 6 to the tongs-arm 3. A spring 6 presses the clamping jaw 5 into its middle position. The tongs-arm 3 ';has anslot FL-through whicha movable tongs-arm 8 passes which is connectedv to thetongs-arm 3 bya bolt The tongs-arm 8 is: provided at one endwith a. clamping jawv l0. and at theother end with a handlev I I. Thetongs-arm. 8. is pressed upwards bya spring 12 acting through. apressure-key l3, whereby the jaws of the. tongs are .pressedto- By pressing: on thehandle H in the direction of the arrow, which can be done by the workman with his .hand or arm without havingto-lay down his tool, the tongs opens. The clamping jaws of the tongs are arranged in Fig. 1 at-an-acute angle-a to-the vertical plane; they mam-however; stand also horizontally or at another-angle. according to the kind of workpiece which is to be held in the device. The side faces of the base I are parallel, so that the fixingdevice can be gripped in avice ltyas shown in Fig. 3,

"with the clamping jaws inan oblique position.

The oblique position of the clamping jawsfis limited in this example of execution toth'e direction :of, the' vice' jaws.

Fig. 4 -shows a tongs-shaped fixing device whichyin contrast to the fixing device of Fig. 1, can be set in any'desired position. A tongs-arm lt and also a tongs-arm ll can beoperated the same manner as the tongs-arm 3 and 8 ct Fig, 1. Aspring i8 is supported below on a ring l 9;;which is pressed by a ballnut ,Zilagainst a' shoulder on 'the. bent overen'd oi the tongs-arm 15 and presses above against a pressureekey 2i which presses the tongs-arm l1 upwards. On. a pro 'jecting edge 22 0i thering i9 is supportedasecldspring Egon whichanedge E iot a bush 2% rests; "The edgelioi the bush hastwo recesses 2L through wiiichthe.key12l can glide. The key 2| is shorter than the internal diameter of the outer spring 23. When the bush 25 is set so that the key 2| can enter the recesses 21, only the spring l8 acts on key 2i or the tongs-arm ll. As soon as the bush 25 is turned a little, the key 2| comes on to the edge 24 of the brush 25, so that both springs l8 and 23 press against the key 2! and through it against the tongs-arm l1. By a pin 34, which is fixed in the arm 66, upward movement of the bush 2:: may be limited. Notches 35 and 36, in which the pin 34 fits, limit the turning of the bush and keep it firmly in the two end positions. 35 is also a vertical slot allowing vertical travel to the spring cup or bush 25. The ball-nut 2B is carried in the socket formed by a base 29 and a plate 39. By a screw 3 3|, which presses on a clamping cheek 32, the ball-nut, and with it the fixing device, may be set so firmly that it can be adjusted in any desired direction comprised within the angle.

The opening of the tongs can, as in Fig. 1, be efiected by pressing the tongs-arm ll down. The tongs-arm may also be connected by a pull member 33 to a pedal actuated by foot.

Fig. 7 shows a gripper-shaped fixing device. An upper gripper part 3'! is connected to a downwardly directed arm 38 which can be fixed in a base as in Fig. 1 or in a base with ball-joint as in Figs. 4 and 5. The connection of the gripper part 31 to the arm 38 may be direct or through a link. For opening the fixing device the lower gripper part 39 may be connected to a pedal. In Fig. 7, for instance, a two-armed lever 4-0 is provided, by means of which the gripper may be opened. The lever 40 can be moved by the hand or arm of the workman, without his having to lay down his tool.

I claim:

1. A workpiece holding device having a pivoted jaw for holding a tapered workpiece, comprising a base having a spherical socket therein, a horizontally disposed member having a downwardly extending leg, a ball on the lower end of said leg and adapted to be movably secured in said socket, an upwardly extending arm on said horizontal member, a laterally pivoted jaw on said arm, a second horizontally disposed member pivoted to the first said member and having an upwardly extending jaw adapted to coact with the first mentioned jaw, a spring on the downwardly extending leg of the first said member and cooperating with the second said member to forceably close said jaws, said second horizontal member being extended beyond said leg to form an operating lever, whereby said jaws may be manually parted for insertion of the workpiece.

2. A workpiece holding device having a pivoted jaw for holding a tapered workpiece, comprising a base having a spherical socket therein, a horizontally disposed member having a downwardly extending leg, a ball on the lower end of said leg and adapted to be movably secured in saidsocket, an upwardly extending arm on said horizontal member, a laterally pivoted jaw on said arm, a second horizontally disposed member pivoted to the first said member and having an upwardly extending jaw adapted to coact with the first mentioned jaw, a spring on the downwardly extending leg of the first said member and cooperating with the second said member to forcibly close said jaws, said second horizontal member being extended beyond said leg to form an operating lever, a hole in said operating lever, a foot operated lever, and a rod pivotally secured to said foot operated lever and said hole whereby said'jaws may be manually parted for insertion of the workpiece.

3. A workpiece holding device having a pivoted jaw for holding a tapered workpiece, comprising a base having a spherical socket therein, a horizontally disposed member having a downwardly extending leg, a ball on the lower end of said leg and adapted to be movably secured in said socket, an upwardly extending arm on said horizontal member, a laterally pivoted jaw on said arm, a recess in said horizontal member, a second horizontally disposed member positioned in said recess and pivotally secured to the first said member and having an upwardly extending jaw adapted to coact with the first mentioned jaw, a spring on the downwardly extending leg of the first said member and cooperating with the second said member to forcibly close said jaws, said second; horizontal member being extended beyond said leg to form an operating lever, whereby said jaws may be manually parted for insertion of the workpiece.

4. A workpiece holding device having a pivoted jaw for holding a tapered workpiece, comprising a base having a spherical socket therein, a horizontally disposed member having a downwardly extending leg, a ball on the lower end of said leg and adapted to be movably secured in said socket, an upwardly extending arm on said horizontal member, a laterally pivoted jaw on said arm, a recess in said horizontal member, a second horizontally disposed member positioned in said recess and pivotally secured to the first said member and having an upwardly extending jaw adapted to coact with the first mentioned jaw, a spring on the downwardly extending leg of the first said member and cooperating with the second member to forcibly close said jaws, said second horizontal member being extended beyond said leg to form an operating lever, a hole in said operating lever, a foot operated lever, and a, rod pivotally secured to said foot operated lever and said hole whereby said jaws may be manually parted for insertion of the workpiece.

ERNST BURRI.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 32,093 Tilliers Apr. 16, 1861 100,868 Cushing Mar. 15, 1870 114,651 Dick May 9, 1871 274,232 Thayer et al Mar. 20, 1883 797,376 Schneider Aug. 15, 1905 985,209 Russell Feb. 28, 1911 2,248,447 Wood July 8, 1941 2,260,995 Kruczek Oct. 28, 1941 

